Abstract

The spectra of hydrogen in the 5 μm window of Jupiter have been recorded at temperatures of 297.5 and 77.5 K for gas densities ranging from 51 to 610 amagats. The binary absorption coefficient has been determined by extrapolation to zero density of the measured profiles. These extrapolated measurements are compared with calculations from the extended Birnbaum‐Cohen model which represents the existing quantum profiles with full accuracy. Within the experimental errors, which are rather larger at low temperature, the agreement is satisfactory at room as well as low temperature.